Is there a way to explicitly create a child coroutine scope? My use case is that I want to create a ...

# flow

[Alexander Maryanovsky]

Is there a way to explicitly create a child coroutine scope?
My use case is that I want to create a bunch of `SharedFlow`s and occasionally close them all. The way I’m trying to do that is by creating them with shareIn(scope.newChildScope()) and closing with scope.coroutineContext.cancelChildren()

[Alexander Maryanovsky]

Hmm, or maybe I don’t need to create a child. Seems that shareIn actually launches a child and the flow runs in it.

[DALDEI]

I think this does it, I've been using the following to create a 'module' scope.
You can use Job() I think instead of SupervisorJob -- SupervisorJob has the semantics that makes sense for my uses.

fun ManagerScope(parent: CoroutineScope,
dispatcher: CoroutineDispatcher) : CoroutineScope =
CoroutineScope( dispatcher + SupervisorJob(parent.coroutineContext[Job]) )

[DALDEI]

And yes shareIn runs a child coroutine, but you dont get a reference to it directly.
Its lifecycle is controled by the sharing parameter

[DALDEI]

Rereading shareIn and launchIn, I think this is closer to what you want
suspend fun doflow() {
coroutineScope {
val sflow = .... flow producing ...
.shareIn( this )
...
val consume = sflow.launchIn( this )
....

// to totally cancel the flow
this.cancel()
}

I havent tried the above, to my read of the docs it would work